Electric motor-car or locomotive.



No. 700,052. Patented May 13, I902. 0. DE KANmi.

moms M0100 CAR 0R LOCDMOTIVE.

(Application filed Apr. 13, 1901.)

(N0 Model.)

WITNESSES UNITED STATES- PATENT OFFICE.

COLOMAN DE KANDO, OF BUDAPEST, AUSTRIA-HUNGARY.

ELECTRIC MOTOR-CAR OR LOCOMOTIVE.

SEEGIFICATION forming part of Letters Patent No. 700,052, dated May 13,1902.

Application filed April 18,1901. Serial No. 55,750. (No model.)

To all whom it may concern:

Be it known that I, COLOMAN DE KANDO, engineer, a subject of the Emperorof Austria- Hungary,residing at Budapest, Austi'iadlungary, haveinvented a new and useful Improvement on Electric Motor-Oars orLocomotives, of which the following is a specification.

My invention has for its object to prevent the passing over of high-tension currents from the parts carrying the current on an electricmotor-car to the car-body or other objects connected with and to personsbeing placed on the same or touching it, by which the danger inherent tothe use of high tension is minimized.

The present invention is illustrated in the accompanying drawings, inwhich Figure 1 is a front elevation, and Fig. 2 a plan View, of anelectric motor-car provided with the present protecting arrangement.

As shown in the drawings, my method consists essentially in covering allthe conductors of high tension, beginning from trolleypole stand 1, tothe earthed terminals-as bare or insulated wires or cables 2, fuses,cutouts, controllers 3, motors 4:, transformers 5, rheostats,distributing-boxes 6,condensators, induction-coils, &c.with a metallicprotecting device 7, which may consist of iron, brass, lead, &c., andinconnectingthe same to earth by aid of the car-truck 8 and wheels 9 or byseparate contact-skates sliding on the rails, yet not shown in thedrawings. This protecting metallic covering does not form a part of thecurrent-circuit, but is carefully insulated therefrom. It has, however,its various sections carefully connected electrically. The parts of thismetallic protecting device, as tubes 7 or boxes, plates, and othersuitable shaped casings, may be electrically connected together bymetallic screws, bolts, wires, cables, ribbons, sliding contacts, am.For instance, in the drawings the protecting-tubes for the cables aresupposed as making electrical connection between theprotecting-incasings of the single controlling and moving devicesas, forexample, the distributingbox 6 and controller-box 3 are connected bymeans of the tube 10. In this case one earthing connection may besufficient for the whole protecting device, or single parts of it may beinsulated from the others and earthed by separate conductors, which maybe connected at one or more points to the truck or to the contactssliding on the rails, or be connected in parallel to one commonearthingconductor.

The electromotors at, transformers 5, and other electromagneticapparatus containing iron cores may be designedin a manner, that partsof the iron cores or the metallic devices securing them should make partof the protecting -boxes and be earthed, disposition supposed in thedrawings.

I do not hold latter method concerning the protection against shocksfrom motors and transformers for new.

I claim as my invention 1. An electric motor-car or electric locomotiveforhigh-tension electric systems, having the conductors, motors and allparts carrying current within the car inclosed by but insulated frommetallic covers surrounding and protecting all such insulated parts,such metallic covers not being part of the electric circuit, but meansbeing provided to electrically connect said covers to the rails,substantially as and for the purpose described.

2. An electric motor-car or electric locomotive for high-tensionsystems, having the current-carrying parts inclosed within but insulatedfrom protective metallic covers electrically connected to the wheels ofthe vehicle, to form an earth connection for the said covers, as and forthe purpose described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

COLOMAN DE KANDO.

Witnesses:

PAUL J OSEPH TOMANOCRY, J r., PAUL BoLUKcY.

